Reservoir Operation Strategy for Multipurpose Utilization of Water Resources

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Project title

Code/計畫編號

MOST104-2625-M019-002

Translated Name/計畫中文名

彰雲地區供水與抗旱策略研究及成效評估-總計畫暨子計畫:因應水資源多元利用之水庫調配策略(I)

Project Coordinator/計畫主持人

Wen-Cheng Huang

Funding Organization/主管機關

National Science and Technology Council

Co-Investigator(s)/共同執行人

方惠民

Department/Unit

Department of Harbor and River Engineering

Website

https://www.grb.gov.tw/search/planDetail?id=11475870

Year

2015

Start date/計畫起

01-08-2015

Expected Completion/計畫迄

01-07-2016

Co-Investigator(s)

Hui-Ming Fang

Bugetid/研究經費

1580千元

ResearchField/研究領域

防災工程
土木水利工程
水土資源保育

"本子計劃以彰化雲林地區與濁水溪流域為研究對象，主要為因應水資源多元利用之水庫調配策略，第一年計畫將主要目標放在探討雲林湖山水庫之水資源利用問題。由於前期計畫結果顯示，湖山水庫與集集攔河堰聯合運轉之水庫利用率偏低，且加上濁水溪泥沙量高，濁度易影響公共給水水質，故本年度計畫將先以湖山水庫獨立運作之情況下，供應雲林地區民生用水每日28萬噸，並改變不同取水規則及增加規線，藉以探討不同取水情境對水資源利用之影響。模擬結果顯示湖山水庫於桶頭攔河堰之引水原則，建議考量於豐水期(5-10月)每日至少可引清水溪流量之10 %、枯水期期間為13 %，則湖山水庫的利用率可達1.9。本研究另於該情境中增設一條規線，將9-18旬的185公尺處訂為湖山水庫規線，當水位高於規線時滿足供水，若低於規線則以9折供水，水庫操作規線的加入將可以有效地減少缺水事件中的日平均缺水量。在缺水指數SI=1之情況下，湖山水庫之日可出水量為38萬噸，較現況每天28萬噸之需求增加了10萬噸，而水庫利用率亦可從1.9增至2.41，此可增加之水量或可透過協商提供其它用水單位(如工業用水或農業用水)，來改善雲林地區缺水情形與減少地下水抽取量。下年度計畫將加入氣候變遷因素，整合彰雲地區各水庫間之水資源，以多元化應用角度切入，並把即將開始供水之湖山水庫加入彰雲地區水資源供水模擬系統，以期結合其他子計畫針對未來地下水情勢評估分析結果，探討彰雲地區未來水資源情勢與供水風險，研擬氣候變遷下彰雲地區水資源調適方案，建立未來缺水時期各標的用水調配管理策略，可提供水資源權責單位研擬因應未來氣候變遷之長期調適策略參考，以降低氣候變遷對彰雲地區水資源層面可能造成之損害。 " "The purpose of this subproject is to study water-resource utilization of a newly built reservoir, the Hushan Reservoir in central Taiwan for public water supply (280,000 m3/day). Since some problems exist in the water supply system of the Zhoshui river, such as its high concentration of sediment, and low efficiency for the Hushan reservoir while it considers a joint operation with Chi-Chi weir. Therefore we consider the Hushan reservoir operates independently in this study. Simulation results show that diversion water from the Tongtou weir into the reservoir can reach 10% at least among the Qingshuei river flow in wet season (from May to October), and 13 % at least for the other periods. In addition, a new rule curve at E.L. 185 m during the 9th~18th ten-day periods is installed for reducing severe water shortage occurrence. That is, when water level is below the rule curve, we will consider cutting 10 % demand off. Moreover, given SI=1, Hushan reservoir has the ability to supply 100,000 m3 more per day (total 380,000 m3/day), and reservoir utilization rate can reach 2.41. The extra water may be used for the other water sectors to potentially improve land subsidence problem in the area. The next step of the subproject 1 is to estimate the impact of climate change and combine the other subprojects to assess the risk of water supply in different scenario. Afterward, adaptation options of water resources would be taken into account. "

Keyword(s)

水庫操作規則
可利用水資源
飛砂
生態基流量
reservoir operation rules
renewable water
eolian sand
ecological instream flow

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Reservoir Operation Strategy for Multipurpose Utilization of Water Resources

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